GB2084835B - Multiplexed electrical signal processor - Google Patents

Multiplexed electrical signal processor

Info

Publication number
GB2084835B
GB2084835B GB8129315A GB8129315A GB2084835B GB 2084835 B GB2084835 B GB 2084835B GB 8129315 A GB8129315 A GB 8129315A GB 8129315 A GB8129315 A GB 8129315A GB 2084835 B GB2084835 B GB 2084835B
Authority
GB
United Kingdom
Prior art keywords
phi
period
electrical signal
switches
signal processor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB8129315A
Other versions
GB2084835A (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asulab AG
Original Assignee
Asulab AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Asulab AG filed Critical Asulab AG
Publication of GB2084835A publication Critical patent/GB2084835A/en
Application granted granted Critical
Publication of GB2084835B publication Critical patent/GB2084835B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H19/00—Networks using time-varying elements, e.g. N-path filters
    • H03H19/004—Switched capacitor networks

Abstract

A multiplexed filter with n channels comprises at least one amplifier G2 with n feedback capacitors C5 to C8 associated with the switches S5 to S8. A switch-controlled resistance R2 (C'r, K5, K6, K7, K8) is connected to its input. Switching signals phi i and phi p out of phase with each other are supplied to the switches K5 to K8 while the multiplexing signals phi 1 to phi 4 are applied to the switches S5 to S8. The signal phi 1 has a period T1 and the signals phi 2 to phi 4 have periods Ti=2(i-1)T1 where i=2 to 4. The period T1 is twice the period of phi i and phi p and the time intervals of all of T1 to T4 are equal to the period of phi i and phi p. This filter with n band pass ranges (n=4 in this example) can serve with advantage for the frequency analysis of an electrical signal delivered by a microphone.
GB8129315A 1980-10-01 1981-09-29 Multiplexed electrical signal processor Expired GB2084835B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH732980A CH641005B (en) 1980-10-01 1980-10-01 DEVICE FOR PROCESSING A VARIABLE ELECTRIC SIGNAL BY MULTIPLEXING.

Publications (2)

Publication Number Publication Date
GB2084835A GB2084835A (en) 1982-04-15
GB2084835B true GB2084835B (en) 1984-10-24

Family

ID=4323428

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8129315A Expired GB2084835B (en) 1980-10-01 1981-09-29 Multiplexed electrical signal processor

Country Status (6)

Country Link
US (1) US4443757A (en)
JP (1) JPS5790700A (en)
CH (1) CH641005B (en)
DE (1) DE3137943A1 (en)
FR (1) FR2491243B1 (en)
GB (1) GB2084835B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4849662A (en) * 1986-04-14 1989-07-18 Crystal Semiconductor Corporation Switched-capacitor filter having digitally-programmable capacitive element
WO1989002192A1 (en) * 1987-08-28 1989-03-09 The University Of Melbourne Switched capacitor circuit
US5182521A (en) * 1987-08-28 1993-01-26 The University Of Melbourne Time-multiplexed switched capacitor circuit having reduced capacitance
WO1989006069A1 (en) * 1987-12-24 1989-06-29 The University Of Melbourne Switched capacitor circuits
JP3337241B2 (en) * 1991-07-26 2002-10-21 テキサス インスツルメンツ インコーポレイテツド Improved multi-channel sensor interface circuit and manufacturing method thereof
US5187445A (en) * 1991-10-28 1993-02-16 Motorola, Inc. Tuning circuit for continuous-time filters and method therefor
US5514997A (en) * 1993-04-14 1996-05-07 U.S. Philips Corporation Inverting delay circuit
US6313620B1 (en) * 1995-09-14 2001-11-06 Northrop Grumman Corporation Detector system for identifying the frequency of a received signal useful in a channelized receiver
US7551519B2 (en) * 2006-12-21 2009-06-23 Dan Slater Passive long range acoustic sensor
US9709671B1 (en) 2014-08-19 2017-07-18 Dan Slater Electrosound camera
US9374063B1 (en) * 2015-02-05 2016-06-21 University Of Macau Gain-boosted N-path bandpass filter

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3466431A (en) * 1966-12-30 1969-09-09 Weston Instruments Inc D.c. power spectrum and fourier transform analyzer
GB1534319A (en) * 1976-08-20 1978-11-29 Cossor Ltd A C Electrical filter networks
CA1088161A (en) * 1978-04-03 1980-10-21 Northern Telecom Limited Sampled analog filters
DE2828440A1 (en) * 1978-06-28 1980-01-03 Siemens Ag VECTOR ANALYZER FOR DETERMINING A DETERMINATION SIZE PROPORTIONAL TO THE AMOUNT OF A LEVEL VECTOR
US4179665A (en) * 1978-09-08 1979-12-18 American Microsystems, Inc. Switched capacitor elliptic filter
CH625373A5 (en) * 1978-12-18 1981-09-15 Centre Electron Horloger
US4306197A (en) * 1979-12-17 1981-12-15 American Microsystems, Inc. Switched-capacitor elliptic filter
DE3022252C2 (en) * 1980-06-13 1983-06-23 Siemens AG, 1000 Berlin und 8000 München Electrical filter circuit for processing analog scanning signals

Also Published As

Publication number Publication date
FR2491243A1 (en) 1982-04-02
DE3137943C2 (en) 1988-07-28
GB2084835A (en) 1982-04-15
CH641005GA3 (en) 1984-02-15
CH641005B (en)
JPS5790700A (en) 1982-06-05
US4443757A (en) 1984-04-17
JPS6348451B2 (en) 1988-09-29
DE3137943A1 (en) 1982-05-19
FR2491243B1 (en) 1986-05-02

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940929